I'm not quite certain what constitutes a low dose AAS cycle, but one would anticipate an increase in one's Hematocrit and Hb levels due to AAS induced erythropoiesis. Since the 1/2 life of RBCs is roughly 55 days, you should be able to estimate the amount of time required for your HCT/Hb to return to normal levels based on the extent of the elevation. AAS dose, type, duration, and individual/genetic factors would determine the extent of the elevation at the time the CBC is assessed. I hope this info helps.
Yes, donating blood on a regular basis would be one mechanism of removing excess RBCs and keeping your HCT/Hb in check. Having your CBC evaluated periodically would help you determine the frequency with which you would need to donate blood.
Possibly another reason to give blood is to lower your iron in your blood. Women lower their iron my menstruating. Since men don’t. Giving blood on a regular basis is a way to lower it. In my last blood test my iron was too high. I’m going to start to give blood on a regular basis to lower It. I’ll let you guys know how it turns out. I've also given up Nutritional Brewers Yeast as it has a lot of bio available iron.